As part of President Obama’s Climate Action Plan, the EPA is proposing to require certain landfills to capture extra landfill gas in order to decrease methane emissions. Methane is a strong greenhouse gas, its global warming potential is 25 times more powerful than carbon dioxide. Landfills are the third largest anthropogenic source of methane in the United States, and methane emissions account for 9% of all emitted greenhouse gases. The new proposal would require landfills to increase their capture of methane and air toxics emissions by 13% by 2023, which would mean capturing two-thirds of emissions. The estimated compliance cost of this proposal is $471,000 in 2023.